OFDM Multiple Antennas Cognitive Radio Relay CDMA Synchronization Channel Estimation Spectrum Sharing Interference Cancellation Neural Networks Resource Allocation Spectrum Sensing Full duplex Stochastic Geometry Equalizer Bi-Directional Feedback Femtocell Heterogeneous Networks Energy Harvesting Device-to-Device (D2D) Spectral efficiency HetNet Cell Search Simultaneous Sensing and Transmission UWB Cognitive relay networks selection diversity Correlated MIMO Two-way communications full-duplex relay self-interference cancellation in-band full-duplex system automatic repeat request (ARQ) sensing duration outage probability mode selection bursty traffic model multi-spectral achievable sum rate Handoff OQAM FBMC Channel estimation error transmission capacity (TC) Heterogeneous channel estimation capability Bi-directional full-duplex full-duplex cellular Link adaptation Cellular networks Vehicular and wireless technologies Latency Shortened TTI Iterative decoder Asynchronized system Cross-link interference LTE-TDD Dynamic TDD NOMA UL grant free Idle cells Windowing 5G networks SINR mismatch problem Ultra-dense small cell networks Time spreading Long Term Evolution-Advanced MU-MIMO TS-W-OFDM interference coordination beamforming coexistence Ultra-dense small cell